https://hl7.org/fhir/uv/subscriptions-backport/2024Jan/notifications.html#adding-queries-to-notifications

"In this guide, the query and coded information are paired together as a string and a Coding respectively. There are two places that need to contain this data: the topic definition and the notification itself."

This implies that both the query string and the coded name for the query will be in the Topic.  The query string MAY be something that can only be determined at run time.  This is how I would describe it:

"In this guide, the query and a coded description of the data provided by the query are paired together as a string and a Coding respectively. For example, you may have a coded description of the query of "patient-problem-list", and an associated query of /Condition?patient=<patient ID>&category=http://terminology.hl7.org/CodeSystem/condition-category|problem-list-item. 

The topic definition would contain the coded description of the queries, and MAY contain the query string itself.  The notification will contain both the coded description and the query string.  In cases where the query string does not depend on parameters determined at run time, it SHOULD be included in the topic definition."